CameraSalvage did not work at all for me and in fact made matters worse.
I had some jpgs that showed up fine on my Canon camera but when i copied and then tried to open them on my ibook i was told the file was corrupt and could not be opened.
I made a disk image of the whole SD card and ran CameraSalvage on it . it only 'salvaged' the files that were perfect anyway- didnt even recognise those that i needed fixed.
Also -CS names the disks it is t o work on in a confusing way which led to me mistakenly having it work on my original SD card. Voila! Files not only appearing as corrupt on my computer but now ALL the files are gone from the SD card -the camera recognizez NONE of the images any more.
If you want to recover some valuable jpegs from your camera DO NOT RISK them with this bad software. I am asking for my money back